Small Signal Detection in the DIMUS Array

In the DIMUS system for steering an acoustic array, the output of each element is reduced to a sequence of polarity samples and delayed by an integral multiple of the sampling period. Calculations are given to show the effect of this process on the passive detection threshold of an array beam (in isotropic Gaussian noise) both in general and numerically for several examples. In these, over all losses range from 0.5 to 1.5 db.